NTSB Identification: CEN17LA093
14 CFR Part 91: General Aviation
Accident occurred Monday, January 30, 2017 in Brenham, TX
Probable Cause Approval Date: 09/06/2017
Aircraft: PIPER J3C, registration: N7039H
Injuries: 2 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
The student pilot and flight instructor were conducting a personal flight. The flight instructor reported that the pretakeoff checks were “normal” but that, during the takeoff, the engine felt “weak” and that the engine lost power during the initial climb. The flight instructor conducted a forced landing to a field, during which the airplane impacted the top of a tree and then the ground.
Examination of the airplane revealed that the exhaust valve for the No. 4 cylinder was stuck in the “open” position possibly due to excessive deposits from the combustion process. It is likely that the stuck exhaust valve resulted in the partial loss of engine power reported by the flight instructor.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows:
The reciprocating engine's exhaust valve being stuck in the “open” position, which resulted in a partial loss of engine power during initial climb.
The National Transportation Safety Board did not travel to the scene of this accident.
Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office: Houston, Texas FSDO SW-09
Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf
NTSB Identification: CEN17LA093
14 CFR Part 91: General Aviation
Accident occurred Monday, January 30, 2017 in Brenham, TX
Aircraft: PIPER J3C, registration: N7039H
Injuries: 2 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
On January 30, 2017, about 1538 central standard time, a Piper J3C airplane, N7039H, sustained substantial damage during a forced landing following a partial loss of engine power during initial climb after takeoff near Brenham, Texas. The student pilot and flight instructor were not injured. The airplane's fuselage and wings were damaged during the forced landing. The aircraft was registered to and operated by the student pilot under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed for the flight, which was not on a flight plan. The flight was originating at the time of the accident for an unconfirmed destination.
The flight instructor reported that pre-takeoff engine checks were normal. He noted that during the takeoff he and the student pilot noticed that the engine felt "weak" but thought it was due to being unaccustomed to the airplane. The flight instructor said that he verified that the magneto switch was in the both position , the primer was locked, and the carburetor heat was off. By this time the remaining usable runway had been exhausted and the airplane was sinking with full throttle applied. He selected a field in which to execute a landing but the airplane impacted the top of a tree and then the ground during the forced landing.
Examination of the airplane by a Federal Aviation Administration Inspector revealed that the exhaust valve for the No. 4 cylinder was stuck in the open position due to excessive deposits from the combustion process.
The crash occurred Monday morning when the pilot began to lose altitude shortly after takeoff.
However, he was able to maneuver the aircraft safely to the ground.
Officials on the scene said a faulty fuel line is believed to have caused the crash, and the incident is under investigation with Federal Aviation Administration.
Source: http://www.jenningsdailynews.net
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